UWL auto refresh not work: time-based and event-based

Hi,

In the scenario of using UWL with BPM, I learned there are two mechanisms about UWL auto refresh. One is auto refreshing periodically, I call it time-based auto refresh; the other is auto refreshing after task completion, I call it event-based auto refresh. The links are below:

Time-based - http://help.sap.com/saphelp_nw74/helpdata/en/4a/ee0563c8481358e10000000a42189b/frameset.htm

Event - based - http://help.sap.com/saphelp_nw74/helpdata/en/8b/4c9559d03640b1b798f25895936f22/content.htm?frameset=/en/8b/4c9559d03640b1b798f25895936f22/frameset.htm

I have tried the two methods, but none of them works. Why?

Best Regards,

Abe